[media] siano: split get_frontend into per-std functions

Instead of handling both DVB-T and ISDB-T at the same get_frontend
function, break it intow one function per-delivery system.
That makes the code clearer as we start to add support for DVBv5
statistics, and for ISDB-T get frontend stuff.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/siano/smsdvb.c

@@ -863,18 +863,14 @@ static int smsdvb_set_frontend(struct dvb_frontend *fe)
 	}
 }
 
-static int smsdvb_get_frontend(struct dvb_frontend *fe)
+static int smsdvb_get_frontend_dvb(struct dvb_frontend *fe)
 {
 	struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
 	struct smsdvb_client_t *client =
 		container_of(fe, struct smsdvb_client_t, frontend);
-	struct smscore_device_t *coredev = client->coredev;
 	struct TRANSMISSION_STATISTICS_S *td =
 		&client->sms_stat_dvb.TransmissionData;
 
-	switch (smscore_get_device_mode(coredev)) {
-	case DEVICE_MODE_DVBT:
-	case DEVICE_MODE_DVBT_BDA:
 	fep->frequency = td->Frequency;
 
 	switch (td->Bandwidth) {
@@ -976,18 +972,41 @@ static int smsdvb_get_frontend(struct dvb_frontend *fe)
 	}
 
 	fep->inversion = INVERSION_AUTO;
-		break;
-	case DEVICE_MODE_ISDBT:
-	case DEVICE_MODE_ISDBT_BDA:
+
+	return 0;
+}
+
+static int smsdvb_get_frontend_isdb(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
+	struct smsdvb_client_t *client =
+		container_of(fe, struct smsdvb_client_t, frontend);
+	struct TRANSMISSION_STATISTICS_S *td =
+		&client->sms_stat_dvb.TransmissionData;
+
 	fep->frequency = td->Frequency;
 	fep->bandwidth_hz = 6000000;
 	/* todo: retrive the other parameters */
-		break;
+
+	return 0;
+}
+
+static int smsdvb_get_frontend(struct dvb_frontend *fe)
+{
+	struct smsdvb_client_t *client =
+		container_of(fe, struct smsdvb_client_t, frontend);
+	struct smscore_device_t *coredev = client->coredev;
+
+	switch (smscore_get_device_mode(coredev)) {
+	case DEVICE_MODE_DVBT:
+	case DEVICE_MODE_DVBT_BDA:
+		return smsdvb_get_frontend_dvb(fe);
+	case DEVICE_MODE_ISDBT:
+	case DEVICE_MODE_ISDBT_BDA:
+		return smsdvb_get_frontend_isdb(fe);
 	default:
 		return -EINVAL;
 	}
-
-	return 0;
 }
 
 static int smsdvb_init(struct dvb_frontend *fe)